67315861 has 2 divisors, whose sum is σ = 67315862. Its totient is φ = 67315860.

The previous prime is 67315837. The next prime is 67315877. The reversal of 67315861 is 16851376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48566961 + 18748900 = 6969^2 + 4330^2 .

It is a cyclic number.

It is not a de Polignac number, because 67315861 - 2⁹ = 67315349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67315861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67315961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33657930 + 33657931.

It is an arithmetic number, because the mean of its divisors is an integer number (33657931).

Almost surely, 2^67315861 is an apocalyptic number.

It is an amenable number.

67315861 is a deficient number, since it is larger than the sum of its proper divisors (1).

67315861 is an equidigital number, since it uses as much as digits as its factorization.

67315861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 67315861 is about 8204.6243667824. The cubic root of 67315861 is about 406.7920607520.

The spelling of 67315861 in words is "sixty-seven million, three hundred fifteen thousand, eight hundred sixty-one".